Important: .NET 6.0 security, bug fix, and enhancement update

Topic

An update for .NET 6.0 is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.118 and .NET Runtime 6.0.18.

The following packages have been upgraded to a later upstream version: rh-dotnet60-dotnet (6.0.118). (BZ#2211715)

Security Fix(es):

• dotnet: .NET Kestrel: Denial of Service processing X509 Certificates (CVE-2023-29331)
• dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack (CVE-2023-29337)
• dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption (CVE-2023-33128)
• dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML (CVE-2023-24936)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• dotNET on RHEL (for RHEL Server) 1 x86_64
• dotNET on RHEL (for RHEL Workstation) 1 x86_64
• dotNET on RHEL (for RHEL Compute Node) 1 x86_64

Fixes

• BZ - 2192438 - CVE-2023-24936 dotnet: Bypass restrictions when deserializing a DataSet or DataTable from XML
• BZ - 2212617 - CVE-2023-29331 dotnet: .NET Kestrel: Denial of Service processing X509 Certificates
• BZ - 2212618 - CVE-2023-33128 dotnet: Remote Code Execution - Source generators issue can lead to a crash due to unmanaged heap corruption
• BZ - 2213703 - CVE-2023-29337 dotnet: vulnerability exists in NuGet where a potential race condition can lead to a symlink attack

CVEs

• CVE-2023-24936
• CVE-2023-29331
• CVE-2023-29337
• CVE-2023-33128

References

• https://access.redhat.com/security/updates/classification/#important